102 POPULAR ILLUSTEATIONS OF 



next family of the Hydrae, the Corynidee. In these and other 

 Zoophytes, as well as in the Calycophoridse and Physophoridse, the 

 germs are carried in a large conspicuous cell (Fig. 102, /, ante, p. 79, 

 and pp. 81, 82, 84), which, by reason of its office as a bearer of 

 germs, has been called by Professor Allman a Gonophore. Fig. 124 

 represents the Gonophore of one of the club-shaped Zoophytes full 

 of young germs. Fig. 125 shows us the same Gonophore after it 

 has opened at one end and given exit to the embryos within it, one 



Fig. 124. Fig. 125. Fig. 126. Fig. 127. Fig. 128. 



of which, provided with a row of cilia by which it can swim through 

 the water, is seen at Fig. 126. By and by we find it assuming a 

 pear-like form, as seen at Fig. 127, and then becoming attached, 

 as shown at Fig. 128, it is developed into a primitive polypite 

 (Fig. 129), which is the founder, by budding, of a colony similar to 

 that seen in the corallines, and which I fully explained, and illus- 

 trated, ante, pp. 79-84. All this was beautifully worked out by 

 Professor Allman, and published by him in the Philosophical Trans* 

 actions for 1863. 



Fig. 130. Fig. 131. Fig. 132. 



In the Sertularidae the changes are still more interesting. In 

 these Zoophytes the Gonophores (Fig. 104, p. 81) contain germs 

 which are exactly like Medusae, and have, in fact, been taken for 

 such by naturalists. These Zooids, as they have been termed by 

 Professor Allman (Fig. 130), after swimming about by means of 



